Self-locking springless hook.



N0. 7@3,368. Patented July I, 1902.

D. E. BARTON.

SELF LOCKING SPBINGLESS HOOK.

(Application filed July 27, 1901.)

2 Sheets-Sheet I.

(I0 Model.)

fla/Zerf E 3427321.

No. 703,368. Patented July I, I902.

D. E. BARTON.

SELF LOOKING SPRINGLESS HOOK.

(Application fllad July 97, 1901.) (lo Modal.) 2 She0t8-$h06t 2.

THE NORRIS PEI'EIHS w. womuma. WASNINGTON. u. c.

' attached.

UNIED STATES PATENT OFFICE.

DELBERT E.'BARTON,.OF RAOINE, WVISCONSINY.

SELF-LOCKING SPRINGLESS HOOK.

S1?EOIFICATION forming part of Letters Patent No. 703,368, dated July 1, 1902.

Application filed July 27, 1901. Serial No. 69,912. (No model.)

To all whom it; may concern.-

Be it known that I, DELBERT E. BARTON, a citizen of the United States, residing at Racine, in the county of Racine and State of Wisconsin, have invented certain new and useful Improvements in Self-LockingSpringless Hooks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My present invention has for its object to provide an improved hook which will work without a spring of any kind and which will have a positive looking action.

To the above ends the invention consists of the novel devices and combinations of devices hereinafter described, and defined in the claims.

In a general way it may be stated that my improved hook is intended for use Where socalled spring snap-hooks 'are now gener ally employed, although in view of its positive locking actionit will be serviceable where the spring-hooks will not satisfactorily serve the purpose. I r

My improved hookis illustrated in theaccompanying drawings, wherein like characters indicate like parts throughout the several views.

Figure lis a view in side elevation showing one'of'myimproved hooks applied to the trolley-head of an electric car. Figs. 2, 3, and 4 are details in side elevation showing the component parts of the hook separated. Fig. 5 is a view corresponding to Fig. 1, but showing the hook as detached from a trolley-pole head; and Fig. 6 is a vertical section approximately on the line a w of Fig. 1, some parts being shown in' full.

The numeral 1 indicates a trolley-pole, having an ordinary head 2, to which the trolleywheel 3 is journaled. As is usual, the said head 2 is provided with an eye/l, to which usually thespring snap hookof the trolleyrope or the end of the trolley-rope itself is In its most approved form my improved hook is made up of'an external annular member at, having a hook a and a bulged notch portion a which parts a and a stand dia- A coopmetrically opposite to each other.

crating internal disk-like member I), which is formed intwo parts secured by rivets or b embrace the sides of the said member a.

One.

The notch a in the member a is relatively shallow as compared with the notch 19 in the member I), this being for an important purpose hereinafter to be noted. The hook at projects laterally from the member a and works just outward of the edge of the lockflange b of the member b. The trolley-rope f is looped at its upper end f, andthis loop is passed through the notch 12 ofthe member I). When the notch b of the member I) registers with thelnotchoiofthe member a, the lock-flange b is-held in a position tolockthe hook. When, however, the said member I) is turned with'respect'tothe member a, (see Fig. 5,) the flange b is turned away from the hook at, and the hook may then be applied to and removed from working position. The

diameter of the rope which forms the loop f spect to the oth'er.:; When, however, the loop f is forced into'the relatively deep notch b of said member I), itwillclear the inner portion of the annularmember a, so that the said member I) may be freely rotated to unlock the hook. I v

The downward pulling strain on the rope f when the trolley is'pulled downward or the weight of the rope itself when it hangs loose keeps the loop f in engagement with the notch a and thus locks the membersga'andb against rotation, or at least against such rotation as would be required toithrow; the lockflange 1) into a releasing position. The said lock flange b may be extended. thro ughwa very much greater segment,,thereby lIICITGQS; ing the oscillation required to release the hook. I

The device is, as is obvious, capable of considerable modification within the scope of my invention. Its range of use is very large.

too

Its application to a trolley-pole illustrates only one of its many uses. It will serve ina most-satisfactory manner as a tug-hook for harnesses, for instance, and in this use of the many forms of connections which may be applied to the members of the hook. Hence I use the term draft, connection broadly to include allforms of connectionssuch as the trolleyrope, tugs, lines, or other devices which may be applied to the pivotally-connected members.

What I claim, anddesire to secure by Letters Patent of the United States, is as follows:

'1. The combination with a pair of pivotallyconnected members having cooperating looknotches and the one having a hook and the other having a cooperating lock-flange, of a draft connection having interlocking-engage ment with, the lock-notches of said members when said locking-notches are registered and normally serving to positively lock said mem bers against rotation, the one with respect to the other, substantially as described.

'2. The combination with the external member a having the hook at, of the internal member Working pivotally within said member a and provided with the lock-flange b and notch b and a draft connection applied Within said notch b and normally holding said lock-flange b and hook at in looking re lations, substantially as described.

3. A pair of pivotally-connected members having cooperating locking parts, said members having cooperating relatively shallow and deep lock-notches, adapted to register when said locking parts are in looking positions, and a draft connection applied to said members and working in said lock-notches, which draft connection is normally held in said shallow lock-notch, to lock said members against rotation and is movable into said deep lock-notch to unlock said members, substantially as described.

4:. The combination with an annular eXte rior member, of disk-like interior members rotativelymounted therein,one member having a hook and the other a cooperating lockfiange, and a draft connection applied to said interior member and normally serving to hold said hook and lock-flange in locking relations, substantially as described.

In testimonywhereof I aflix'my signature in presence of two witnesses. v p DELBERT E. BARTON. Witnesses JAs. F. WILLIAMSON,

F. D. MERCHANT. 

